File make_tuple_tag.h

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#ifndef TEMPLAT_UTIL_RANGEITERATION_MAKE_TUPLE_TAG_H
#define TEMPLAT_UTIL_RANGEITERATION_MAKE_TUPLE_TAG_H

/* This file is part of TempLat, available at https://cosmolattice.github.io/templat .
   Copyright 2021-2026 The TempLat authors, see AUTHORS.md.
   Released under the MIT license, see LICENSE.md. */

// File info: Main contributor(s): Adrien Florio, Year: 2019

#include "TempLat/util/rangeiteration/tag.h"

namespace TempLat
{

  template <int Start, typename F, int... I> auto make_tuple_tag_impl(F &&f, std::integer_sequence<int, I...> iseq)
  {
    return std::make_tuple(f(Tag<I + Start>())...);
  }
  template <int Start, int End, typename F> auto make_tuple_tag(F &&f)
  {
    return make_tuple_tag_impl<Start>(std::forward<F>(f), std::make_integer_sequence<int, End - Start>());
  }

  template <int End, typename F> auto make_tuple_tag(F &&f)
  {
    return make_tuple_tag_impl<0>(std::forward<F>(f), std::make_integer_sequence<int, End>());
  }

#define MakeTupleFromTag(i, start, end, expr) make_tuple_tag<start, end + 1>([&](auto i) { return expr; })

} // namespace TempLat

#endif